System of motor control.



N. D. LEVIN.

SYSTEM OF MOTOR CONTROL.

APPLICATION FTILED MAR. 23, 1917.

Patenfd Jam. 7, 1919.

2 SHEETSSHEET 1.

IfITNES-SES.

1 N. D. LEVIN.

Patented Jan. 7', 1919.

2 SHEETSSHEET 2- I STATESJPATENT onnron,

mas D. .mivm', or COLUMBUS, onxofassmnon TO THE .inrrnmz misnoraorunme comrm, or COLUMBUS, 01:10, A conron 'rxon or OHIO.

SYSTEM or moron conrnoL.

Patented Jan. 7, 191$.

' Application fled March 8,1917. Serial No. 153,472.

To all t chom it may concern:

Be itknown that L' Nms -D. LEVIN, a citizen of the United States, residing at Colum bus, in thecounty of Franklin and the Stale of Ohio, have invented certain new and use: ful Improvements in Systems of Motor Control, of which'the following isa specification, reference being had therein to the accompanying drawmg.

The present invention relates to improvments current controlling apparatus adapted for use in operating a motor-propelled vehicle and for operating a mining mechanism adapted to be fitted to said vehicle, and also to be removgd and actuated at points remote therefrom, the same motor and the same controlling devices being uti lized'both for propelling the vehicle and the machine and for actuating the cutting mech anism.

The devices by which I attained this ob-' ject are set forth in the following specification, and illustrated in the accompanying drawings of which Figure l is a generalplan view of'a min- 'ing. machine and truck, of well known design equipped with the devices of my invention,- showing the mining machine removed from thetruck.

Fig. 2 is a side elevation of the devices illustrated in Fig. 1 showing the mining machine loaded upon the truck for transportation along the tracks of the mine.

Fig. 3 is a side elevation of a modification of the devices illustrated in'Fig. 2, the cable reel and electrically actuated controlling devices being mounted upon an auxiliary truck for greater conveniencein operation.

Fig. 4 is an electrical diagram illustrative of my invention. I

Like-numerals refer to similar parts in the several figures.

For purposes of illustration, I have shown 1 in Fig. 1 of the drawings, a plan view of a minin machine and its attendant truck of a well known design. This mining machine is adapted to be moved about over the floor of a mine room to cut a kerf at the base of the coal body, or to be loaded upon the truck for transportation from one part of the mine to another.

The mining machine here illustrated, comprises a main frame 1 adapted to restupon and slide over the' floor of a mine, from which projects a cutter frame 2 about the 11 which constitutes part tliefg'earing sys tem by which the powefkofrthelfmotor is transmitted to the several rati lements of the mining machine;

The truck com rises frame 12 adapted'ito conveme htlyireceive the mining machine, support it fortransportation and convenientlv discharge it at-the place Where it is to perforniitsfcuttingoperations. vAttached, to this frame 12 are, journal bearings 13 and-inc these are iournaled the axles 14and'15fTo the axles 14 and 15 are at tached the t'ractio'n wheels 16 which support the truck upon the rails 16 of the mine track. The axles 14 and 15 are rotatively connected together bv an endless chain 17 engaging suitable sprocket wheels attached to the respec tiveaxles. The axle 15 is also connected by a siinilar endless chain 18 with the transverse power shaft 19 journaled in suitable bearinas 20 attached to the truck frame." The shaft 19 is connected through a pair of bevel .gears 21 and 22 with a longitudinal power shaft 23 'journaled in bearinas 24 of the. truck frame. At the forward end of the shaft 23 is attached a bevel'pinion 25 which is adapted to engage with the master gear -11 when the mining machine is in nosition -for transportation noon the truck. Bv this arrangement of gearing power may be trans-- mitted fromithe tnotor of the mining machine tn the 'trad tion wheels to propel the truck along the *tracks of the mine? Ah tached to the rear end of the trucklframevifli. is a supplemental frame 26 having' journal bearings 27 and 28 in which is su ported the winding drum 29. Attached td the windingdrum 29 and windable thereo n'isa flexible confluctor cable 30 containing two electric conductors 31 and 32 terminating in hooks 33 and 34 by which thev may be connected respectively with the positive and negative conductors of the current supply system exedges of which travels a cutter chain 3 havtending files mine to supp you s c u e n "connected by an endless rope or helc 3'? iii t -1'esistance 55, 5e and verse switch contacts 45),

. cluctoi' 32.

such manner thee the inding will be rotated to Wind the cable 3-0 as the truck moves toward the point of et'euchmene with the supply circuits, es pay out seid' cebie es the truck travels away from such come of attachment. Mounted ugcon the cruel; fra ue "i2 is a casing 38 coneeimng the electrically actuated circuit closing switches and motor controlling resisience by which the mining machine motor 9 is controlled. From this casing 38 extends a multiple conductor flexilole cable 39 by which the devices Within the casing are connecied with the devices upoii the motor 9. Connection is also made by short flexible cables 40 end a l with the cruenions in' the journal boxes 2'? cool. 28 which are connected with ihe conductors of the flexible cable 38 in manner well known in the are.

As the details of construction of the Li 5- vices used form no pert in the present in veniion l: have shown them the diagram, Fig", 4 of the drawings, by ilie customary 0 I symbols which are undersioocl by persons skilled in the art. The couductoi s 12, 42 3, ifi, 45, 46, 47; and 4.8 are all COII'iLfilHf-Jd wii hm the flexible cable 39" The reversing s'wi'icli 49 and the controlling switch 50 are mounts ed upon the mining machine convenient to the hanol of the operator, While the electrically actuated circuit closing switches 51, 52, 53 and; 54 and the motor comm-oiling resiso once 55, 56, and 57 are mounted ithin ihe casing 38 upon the crucli: W'lieu ie is cicsii'ecl iio start the motor the reversing switch i9 is first set 50 ccnuecc he armature and fieiol coilsf in such re -(men as to produce the olesirediiirection o1 ro'ietion of the armature. The controlling; switcii blade-.58 is then moved to its firs; operative posiiriou in Contact with the segment 60 causing current to flow from the positive conductor 31 through the actuating coil the circuit closing switch 51 ihe couclucioi swivfici loleole 50, contact segment 60, COIlCiJCtOlS 8% and 48 to the necmpive conductor thereby 6.1 actuating the 0011 to close the contactor 51. Current will then fie? from she positive conductor 31 through he cont-actor 51, the comiuctor 4'2, ireconcluciei' 6i armature 58 conc iuctozreverse switch contacts 49 conductor 6'2, series 1 59, and couducior 4-8 to the zie At the same Lime 6: flow from the point iihrough ductor 46, shunt sue coils '65 48430 the negative conductor slow speed, ihe com 5G is eelvenceii 53o conflict sue-- v L L I men we cones/cc segmems 61, be coils of the fillcllli closing ,ar' ed sw-ilaches 52 and will he successiveiy actuated iocut one, the sections 55, 56 anti.

5? of the yesis nc oi'ogressively increasing the speed the iiioton When the switch blele 50 is moved in ehe reverse clirecicn it is apparent thee the ciicuii, closing switches will operate successively to open their i espective circuits reducing the speed of the motor unifiii the East swiicli 51 isopeueoi u when the motor will step By ehe arrangement of apparatus here descriived the contro the motor?v iseffeciecl. by the menipuis ion of parts positioned upon the {machine convenient (as hand of izhe ope mac-i While switches em. sistencesfoi sufiicient capes. n i0 coo, cl 1 1e i Seed and of pi'o 'ioi-ezious mocoi umier fui iihe crying condilzions he durable use coal mine service may be employed Wiilioul; unduly increasing the Weight diiu sions of hie mining machine, and: the design of both the miningineehine eucl. truck 1'; V he materially piiiie by the omission of friction clutches and reversed: gee? mechanism f rme'rly found he clesimhie,

l Vhen the mining machine is loaded upon the truck ihe speeii and direction of travel may he controiiecl through the manipulaeiou of the coniioliing switch 50 and reverse switch 49 with :he facility of operating electric locomotive while the flexibility the cable 39, connecting the clevices upon i, e truck with those upon the mining muchiue permits the greetesfiz freedom of m'ovemeui; of ehe mining machine when uiiloeiieci from the truth, v

in 3 l have iliusiu'aietl e 3. of iiil devices above describe-5 Wlici'eiu able reel the concioller casing 08 have been separated from izhe mining; 3119: chine lruclc and uniecl upon an auiliury iruclq which is conneccible to the mining machine truce iiliiy av suibzihie coublicg 71. As the seem m of the cable Feel and. such auxiliary psi-ls from file mining machine truck and ilie p o'vision of on nine iliai'y imcl: for their more cohvenienl: liensportecion around the shore curves of ihe narrow pass gee o i mi? is Well known in the are is is here ihougght 11o constitute equivalent method ie time shown in F1 c 1 and 2 and further clesciiption is not iieemefl pose tion on the said wheeled truck, but separable, and operative when separated there from, said mining machine comprising a. motor adapted both to actuate the mining apparatus, and to propel the Wheeled truck, the combination with the "Wheeled truck, of e wheehdriving mechanism permanently mounted thereon, the mining machine removable from the truck but adapted to be fitted thereto to position the motor thereon in predetermined operative relationship to the said truck driving mechanism, and a two-part set of motor control devices, one

part being mounted permanently on the truck and the other part on the mining machine, and adapted to regulate the motor when propelling the truck and also regulating it when actuating the mining apparatus at points remote from the truck.

In testimony whereof I afiix my signa ture, in the presence of two witnesses.

NILS D. LEVIN. 

